[ET Trac] [Einstein Toolkit] #737: simfactory sync can lead to inconsistent builds

Einstein Toolkit trac-noreply at einsteintoolkit.org
Mon Jan 23 16:17:09 CST 2012

#737: simfactory sync can lead to inconsistent builds
 Reporter:  rhaas       |       Owner:  eschnett
     Type:  defect      |      Status:  new     
 Priority:  major       |   Milestone:          
Component:  SimFactory  |     Version:          
 Keywords:              |  
 simfactory's sync command uses rsync with the --archive (-a) option. This
 option set the modification date of files on the target machine to that on
 the source machine. This can lead to inconsistent builds in the following

 [1] local: edit source_file.c
 [2] local: simfactory sync
 [3] local: edit source_file.c
 [4] remote: simfactory build
 [5] local: simfactory sync
 [6] remote: simfactory build

 [6] will not rebuild source_file.o since [5] set the modification time to
 that of [3] which which is older than [4] hence make will not consider
 source_file.o to be out-of-date.

 A simple fix is to add --no-times to the rsync options. Unfortunately this
 disables rsync's file modification time optimization and requires it to
 compute checksums on all files which can be very slow on slow filesystems.

Ticket URL: <https://trac.einsteintoolkit.org/ticket/737>
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